208 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



and equal to those above it. D. S; A. 7 5 scales 13-70-13. Tributaries 

 of the Rio Grande in Colorado and T^ew Mexico. [Cope.) 



{EhiniclUhi/s maxillosua Cope & Yarrow, Z06I. Wheeler's Expl. W. 100th Mer. v, 644, 

 1877 (uot of Cope, 1864); Cope, Amer. Nat. July, 1879, 441.) 



316. B. obtaisus Agassiz. — Broion-nosed Dace. 



Very similar to B. atronasus, but usually rather stouter, the barbel 

 more distinct, the head a little shorter, and the coloration somewhat 

 ditterent. Back olivaceous, mottled with darker; sides with a rather 

 faint brownish band, margined above and below with paler; belly sil- 

 very; a dusky blotch in the middle of the base of the dorsal fin; males 

 with the pectoral fins enlarg ;d, and with the lateral band rosy. Head 

 4; depth 4^. D. 7; A. 6; scales 4-63-8; teeth 2, 4-4, 2. L. 3 inches. 

 Wisconsin to Georgia ; abundant in clear brooks. Probably a variety 

 of the next species. 



(Agassiz, Amer. Joiirn. Sci. Arts, 1854, 357; Giinther, vii, 190; Jordan, Ann. Lye, 

 Nat. Hist. N. Y. 1876, 331: Rhinichthys lunatiis Cope, Proc. Acad. Nat. Sci. Phila. 1864, 

 278: Ehinichthys meleagris Agassiz, AmeT. J onvn. Sci. Arts, 1854,357: Bhinichthys meleagris 

 Nelson, Bnll. Ills. Mus. Nat. Hist, i, 46: Bhinichthys meleagris GnntheT, vii, 190.) 



317. B. atronasus (Mitch.) Ag. — Black-nosed Dace. 



Body moderately elongate, little compressed. Head moderate, rather 

 broad and flatfish above. Snout moderate. Mouth small, horizontal, 

 sub terminal, the lower jaw included, barbel minute but probably always 

 present, uj^per lip on the level of the lower part of the pupil, max- 

 illary not reaching nearly to the eye. Eye small, nearly median, 1^ in 

 snout, 4^ in head. Fins rather small; dorsal fin well back. Scales 

 quite small, somewhat imbedded. Lateral line somewhat decurved. 

 Color blackish above; some of the scales irregularly darker ; a black 

 band passing from snout through eye and along the sides of the 

 body; a pale streak below this ; belly silvery ; males in spring with the 

 lateral band and the lower fins, and sometimes the whole body, bright 

 crimson ; males in late summer with the lateral band scarlet or orange, 

 the red color growing fainter later in the season. Head 4 ; depth 4^. 

 D. 7 ; A. 7 ; Lat. 1. 64 ; teeth 2, 4-4, 2. L. 3 inches. :N^ew England to 

 Ohio and Virginia ; very abundant in clear brooks and mountain streams. 



(Cyprinus atronasus Mitch. Trans. Lit. & Phil. Soc. i, 460; Giinther, vii, 191.) 



90.— AGOSIA Girard. 

 (Girard, Proc. Acad. Nat. Sci. Phila. 1856, 186: type Agosia chrysogasfer Grd.) 



Body moderately elongate. Mouth moderate, normal, the premax- 

 illaries protractile, the maxillaries with a terminal barbel. Teeth 4-4, i 



